Introduction to Fluid Mechanics: Surface Tension

MEC615/BME516 Chapter 1 Introduction to Fluid Mechanics, Part 4 Surface Tension: A discussion of surface tension of fluids, surface wettability, and capillary action. (Rev.3)

Link to Solved Problem: Liquid Rise is a Capillary Tube

Course Textbook: F.M. White and H. Xue, Fluid Mechanics, 9th Edition, McGraw-Hill, New York, 2021.

#fluidmatters #fluidmechanics #fluiddynamics

[huanyu]

Very clear video. If you never learn about surface tension, watching this video is enough! Slides are nice. Examples are easy to understand. You solved all confusion I have. This is the best video I about the surface tension I saw in youtube

[franciscoramos]

My professor left me feeling confused about this topic until I watched this video. Everything makes sense now – the slides and examples were very helpful. Thank you!

[littleprinceofmath]

This is a great video, really helped me understand the formulas in a more comprehensive and intuitive way, thank you !

[nikannow]

Thanks. There's something I cant quite understand. If we do a free body diagram of the segment of the curved bulk of fluid you showed, we can see tensile forces acting across the two slanted faces but these are ignored in calculations and only the surface tension is considered. Why? I know there's an imbalance of forces on the individual molecule at the top but as a bulk in thst segment shown there are tensile forces all the way across the two faces too. I'm focusing on a FBD of that slice of the sphere.

[ImTheReal]

That aknowledge should be used to make tests using a liquid with in the same scale when scientists are studing a what happens in/with a large ship. Like:
If you are testing a ship that are in a scale 1:100, the liquit won't be water, but another that have the same tension surface (1:100) or something nearly it. But it's only the begining to discover the for the best what'll happen in a 1:1 scale.